public class Solution2 {
    public int findPoisonedDuration(int[] timeSeries, int duration) {
        int ret = 0;
        for(int i = 1; i < timeSeries.length ; i++) {
            int x = timeSeries[i] - timeSeries[i - 1];
            if(x < duration) {
                ret += x;
            }else {
                ret += duration;
            }
        }
        ret += duration;
        return ret;
    }
}
